P
- Packer, Asa (1805–1879), LV.
- Page, William N. (1854–1932), VGN.
- Palmer, William Jackson (1836–1909), KP, D&RG 1870-1901.
- Parkinson, David L., CFNR 1993-.
- Patterson, William C., PRR 1849–1852.
- Pattison, Robert K., LIRR 1976-1978.
- Payne, Henry Clay (1843–1904), MER&L, NP.
- Peabody, Charles A., IC 1918-1919.
- Pease, Edward (1767–1858), S&D 1825-1829.
- Pelletier, Jean (1935–2009), VIA 2001-2004.
- Pennington, Edmund, SOO 1909-1922.
- Perham, Josiah, NP 1864-1866.
- Perlman, Alfred E. (1902–1983), NYC 1954-1968, PC 1968-1970, WP 1970-1973.
- Peters, Ralph (born 1853), LIRR 1905-1923.
- Phelps, John Jay (1810–1869), DLW -1853.
- Phelps, Timothy Guy (1824–1899), SP 1865–1868.
- Pick, Frank (1878–1941), LPTB 1933-1940.
- Pitcairn, Robert, PRR Pittsburgh Division.
- Plant, Henry B. (1819–1899), Plant System
- Pomeroy, Samuel C. (1816–1891), ATSF 1863–1868
- Poppenhusen, Adolph, LIRR 1877.
- Poppenhusen, Conrad, LIRR 1876.
- Post, Waldron B., LIRR 1838-1839.
- Potter, William F., LIRR 1905.
- Pound, Thaddeus C. (1833–1914), CF&W, StPEGT.
- Power, Thomas F., Jr., WC -2001.
- Prendergast, Thomas F., LIRR 1994-2000.
- Provo, Larry S., CNW 1968-1976.
- Purdy, Warren G., RI 1898-1901.
Read more about this topic: List Of Railroad Executives